MINI SCREW JACK:Although the Mini Screw Jack is small in size, it is big in strength and durability. EASY TO USE: To make adjustments to the height of the Mini Screw Jack, Just use a pipe wrench to turn the screw to the required height, and then tighten the positioning nut. SAFE & SECURE: Built with high quality materials, this adjustable support jack is extremely versatile and useful in small spaces.This product includes a safety lock set screw to ensure security. VARIETY OF USES:Temporarily secure a weak floor or screw jacks home leveling post floor jack. STURDY & DURABLE:Support Jack made of heavy duty steel, more durable and sturdy.